t5 won't start
 

Hello, reciently one of the time bands (not the one that connects the crankshaft with the valves) of my t5 broke, I was able to get it with the mechanic, he changed the band but it won't start and we both haven't idea of what is could be the problem, I searching desperately for help, someone has an idea of what it could be the problem?

Thank you for your time, god bless you!

okay, the valves got screwed again, that was the problem, but thank you for your time!